There are two basic different insecticides contact insecticides and systemic insecticides. Contact insecticides work when the insecticide comes into the contact of the surface of the insect whereas systemic insecticides are consumed by the insect, however both forms of insecticide can have consequences for other insects and the environment as a whole. https://youtu.be/cOGkkPxzY6M
I know that wasp spray, specifically, is in a different container than others because it is intended to be used outside and from further away so the spray nozzle is designed to spray much further and be more concentrated where it hits.
I don’t know about ant/roach spray but I suspect it is similar, the nozzle is designed to be more defuse so you can more easily cover more area.
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